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GB812816A - Luminescent indicating device - Google Patents

Luminescent indicating device

Info

Publication number
GB812816A
GB812816A GB1228255A GB1228255A GB812816A GB 812816 A GB812816 A GB 812816A GB 1228255 A GB1228255 A GB 1228255A GB 1228255 A GB1228255 A GB 1228255A GB 812816 A GB812816 A GB 812816A
Authority
GB
United Kingdom
Prior art keywords
tuning
indicating
state
circuit
indicating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1228255A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB812816A publication Critical patent/GB812816A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/14—Magic-eye or analogous tuning indicators

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

812,816. Indicating-apparatus. UMEDA, S. April 28, 1955, No. 12282/55. Class 106 (4). [Also in Group XL (a)] A pointer for indicating the state of tuning of a resonant circuit comprises an evacuated glass discharge envelope 7 rotatable or slidable along a scale 13 and mechanically connected with the tuning element of the circuit, e.g. a variable condenser. The envelope contains an anode 1 in the form of an arrow-head of substantially U-shape cross-section having at least part of its surface coated with a fluorescent material, the extent of fluorescence of which gives an indication of the state of tuning of the circuit.
GB1228255A 1955-04-28 Luminescent indicating device Expired GB812816A (en)

Publications (1)

Publication Number Publication Date
GB812816A true GB812816A (en) 1959-04-29

Family

ID=1716958

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1228255A Expired GB812816A (en) 1955-04-28 Luminescent indicating device

Country Status (1)

Country Link
GB (1) GB812816A (en)

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